Electrodeposited pattern



I 'INVENToR l .rhcrr Leuke! ATTORNEY A. K. LAUKEL vELECTRODEPOSITED PATTERN 'Filed Dec. 5, 192e Sept. 29, 1931.

Patented Sept. 29, 1931 fszaiee PAneN'rA oFFlcE ARTHUR K. LAKEL, OF DETROIT, MICHIGAN ELECTRODEPOSITED PATTERN Application. led December 3, 1928. Serial No. 323,391.

The present invention pertains to an electrolytically deposited pattern for molding purposes, wherein the molding surfaces of the pattern are reproduced by plating vmetal 'e' such` as copper into an impression taken from the body to be reproduced, as disclosed for example in my co-pending application Serial No'. 108,715 filed May 18, 1926.

Vhereas the 'electrodeposit might ordinarily be made rather thick,` the' object of the present inventionV is to make this deposit of only such thickness as to withstand manipulation in a 'subsequent reinforcing operation. ln other words, the thickness of the metal is such that, without reinforcement, it is not suiliciently strong to withstand manipulation in molding operations in the foundry. The purpose of reducing the thickness of the deposited metal to a minimum is to shorten the time necessary for deposition' and to reduce the cost of the finished product, inasmuch as the reinforcing material with which the deposited body or shell is filled, is cheaper than deposited metal. The filling material may consist of a white metal alloy or even a cementitious material, and the shell may be further reinforced, prior to filling, by plating heavier in the corners and by plating ties across 3U points that might otherwise buckle. p

The invention is fully disclosed by way of example in the following description and in the accompanying drawings, in which Figure 1 is a plan view of a mold with the shell deposited therein;

Figure 2 is a plan view of the pattern after being filled with reinforcing material and after levelling of the parting surface;

Figure 3 is a section on the line 3-3 of Figure 2; and

Figure 4 is a section on the line 4 4 of Figure 2.

Reference to these views will now be made by use of like characters which are employed to designate corresponding parts throughout.

In Figure 1 is illustrated a mold 1, which may be made as a plaster cast of the body to be reproduced. rThe impressed surface of U the cast and the margin of the impression are made conductive in any suitable manner, and the mold is suspended in an electrolytic bath, with the conductive surface wired as a cathode, whereby a deposit 2 is formed on the conductive surface.

The shell is subsequently to be filled with a reinforcing material7 and in the interest of a quick plating operation andeconomy in plating metal, the shell is allowed to grow to only such vthickness as willV withstand 1 entlybe described. Where the shell is likely to buckle in handling prior to filling, it may be provided with ties 4 deposited from wall to wall thereof on conductive bridges inserted in the shell before the plating operation is completed. Also, a heavier deposit may be caused to Vaccumulate in the corners asindicated by the numeral 5 in the various figures, by means of anodes insertedin the corners.

The shell is` then filled vwith a suitable reino forcingunaterial 6, suchV as a low melting alloy or a cementitious material, either before or after removal from the mold. Cavities 7 may be retained in the filling material at the wider parts of the mold'in order to govern the weight of the avoid waste of material.

The parting surface of the filled pattern is now machined off as indicated by thenumeral 8; It will be seen by reference to Figure 2 that certain of the ties 4, are practicallyburied in the filling material after the machining operation, but inasmuch as these ties extend from wall to wall beneath the surface of the filling material, they serve the purpose for which they are provided. The machining operation further removes the flange 3 as may be seen by a comparison between Figuresl and 2.

The invention has beendescribed 'incon-` product and to v CII nection with patterns, but the word pattern is used in its broad sense, meaning a reproduction of another body for foundry purposes.

Although a specific embodiment of the invention has been illustrated and described, it will be understood that various alterations in the details of construction may be made without departing from the scope of the invention as indicated by the appended claims.

Having thus fully described by invention, what I claim as new and desire to secure by Letters Patent is 1. A metal pattern consisting of a shell of electrolytically deposited metal of insufiicient thickness to withstand manipulation in molding opera-tions, and a filling material therein for reinforcing the same, said material being of a character capable of withstanding high production molding operations.

2. A split metal pattern consisting of a shell of electrolytically deposited metal of insufficient thickness to withstand manipulation in molding operations, and a filling material therein for reinforcing the same, said material being of a character capable of withstanding high production molding operations, said shell and reinforcing maerial being machined at the parting surace.

3. A metal pattern consisting of a thin shell of electrolytically deposited metal, a

filling material therein for reinforcing the same, said material being of a character capable of withstanding high production molding operations and ties of deposited metal across said shell at selected points thereof.

4. A metal pattern consisting of a thin shell of electrolytically deposited metal, said shell being thicker in the corners, and a filling material in said shell for reinforcing the same, said material being of a character capable of withstanding high production molding operations.

5. A metal pattern consisting of a shell of electrolytically deposited metal of insufficient thickness to withstand manipulation in molding operations, ties of deposited metal across said shell at selected points thereof, and a filling materia-l in said shell for reinforcing the same, said material being of a character capable of withstanding high production molding operations.

6. A metal pattern consisting of a shell of electrolytically deposited metal of insufficient thickness to withstand manipulation in molding operations, said shell being relatively thicker in the corners, and a filling material in said shell for reinforcing the same, said material being of a character capable of withstanding high production molding operations.

7. A metal pattern consisting of a thin shell of electrolytically deposited metal, and a filling material therein for reinforcing the same, said material being of a character capable of withstanding high production molding operations, said filling material forming cavities in the wider parts of said shell.

8. A metal pat-tern consisting of a thin shell of elcctrolytically deposited metal, a filling materialtherein for reinforcing the same, said material being of a character capable of withstanding high production molding operations, and ties of deposited meta-l across said shell at selected points thereof, said filling material forming cavities in the wider parts of said shell.

9. A metal pattern consisting of a shell of electrolytically deposited metal of insufficient thickness to withstand manipulation in molding operations, and a poured metal filling material therein for reinforcing the same, said metal being of a character capable of withstanding high production molding operations.

In witness whereof I have hereunto set my hand.

ARTHUR K. LAUKEL. 

